PBDB Timescale

Ordovician of Britain

The interval definitions in this timescale are derived from the following sources:

F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
W. B. Harland, R. L. Armstrong, A. V. Cox, L. E. Craig, A. G. Smith and D. G. Smith. 1990. A Geologic Time Scale 1989. view
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view

There are 14 timescales which overlap this one. show

Interval boundaries marked with * have been interpolated based on the differences between the ages for international timescale boundaries quoted in the source and the currently accepted ages for those boundaries.

Interval names marked with † are no longer in current use.

This timescale is used in the definition of 4546 collections

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International Chronostratigraphic Timescale			Ordovician of Britain				Cambrian Epochs	Obsolete Names for ICS Units			Ordovician of the Baltic
Neogene	Pliocene	Piacenzian						Tertiary †							2.58
	Pliocene	Zanclean													3.6
	Miocene	Messinian													5.333
		Tortonian													7.246
		Serravallian													11.63
		Langhian													13.82
		Burdigalian													15.98
		Aquitanian													20.44
Paleogene	Oligocene	Chattian													23.03
	Oligocene	Rupelian													27.82
	Eocene	Priabonian													33.9
		Bartonian													37.71
		Lutetian													41.2
		Ypresian													47.8
	Paleocene	Thanetian													56
		Selandian													59.2
		Danian													61.6
Cretaceous	Late Cretaceous	Maastrichtian													66
		Campanian													72.1
		Santonian													83.6
		Coniacian													86.3
		Turonian													89.8
		Cenomanian													93.9
	Early Cretaceous	Albian													100.5
		Aptian													113
		Barremian													121.4
		Hauterivian													125.77
		Valanginian													132.6
		Berriasian													139.8
Jurassic	Late Jurassic	Tithonian													145
		Kimmeridgian													149.2
		Oxfordian													154.8
	Middle Jurassic	Callovian													161.5
		Bathonian													165.3
		Bajocian													168.2
		Aalenian													170.9
	Early Jurassic	Toarcian													174.7
		Pliensbachian													184.2
		Sinemurian													192.9
		Hettangian													199.5
Triassic	Late Triassic	Rhaetian													201.4
		Norian													208.5
		Carnian													227
	Middle Triassic	Ladinian													237
	Middle Triassic	Anisian													242
	Early Triassic	Olenekian													247.2
	Early Triassic	Induan													251.2
Permian	Lopingian	Changhsingian													251.902
	Lopingian	Wuchiapingian							Longtanian †						254.14
	Guadalupian	Capitanian													259.51
		Wordian													264.28
		Roadian													266.9
	Cisuralian	Kungurian													273.01
		Artinskian													283.5
		Sakmarian													290.1
		Asselian													293.52
Carboniferous	Pennsylvanian	Gzhelian													298.9
		Kasimovian													303.7
		Moscovian													307
		Bashkirian													315.2
	Mississippian	Serpukhovian													323.2
		Visean													330.9
		Tournaisian													346.7
Devonian	Late Devonian	Famennian													358.9
	Late Devonian	Frasnian	372.2
	Middle Devonian	Givetian	382.7
	Middle Devonian	Eifelian	387.7
	Early Devonian	Emsian	393.3
		Pragian	407.6
		Lochkovian	410.8
Silurian	Pridoli		419.2
	Ludlow	Ludfordian	423
	Ludlow	Gorstian	425.6
	Wenlock	Homerian	427.4
	Wenlock	Sheinwoodian	430.5
	Llandovery	Telychian	433.4
		Aeronian	438.5
		Rhuddanian	440.8
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian	Harju	Porkuni	443.8
		Katian		Rawtheyan		Pirgu	445.2
				Cautleyan			448.9 *
				Pusgillian			449.3 *
			Caradoc	Streffordian		Onnian †	Vormsi	449.6 *
							Nabala	Johvi †		450 *
					Viru		Rakvere			450.6 *
				Cheneyan			Rakvere			451.5 *
				Cheneyan			Oandu			452 *
				Burrellian			Oandu			452.7 *
		Sandbian					Keila	Idavere †		453
						Actonian †	Keila			453.2 *
						Actonian †	Haljala			453.9
						Marshbrookian †				Woolstonian †	454.2 *
						Longvillian †					455.2 *
							Kukruse				456.4 *
				Aurelucian							456.8 *
						Soudleyan †/Harnagian/Costonian					457.4 *
						Soudleyan †/Harnagian/Costonian	Uhaku	Aluoja †			457.5 *
	Middle Ordovician	Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			Uhaku				458.4
							Lasnamagi				458.9 *
							Aseri				460.4 *
				Abereiddian/Early Llanvirn			Aseri				461.3 *
					Oeland		Kunda				462.9 *
							Kunda	Valaste †/Hunderum			464.3 *
							Volkhov				Langevoja †/Vaana/Saka	467.1 *
		Dapingian										467.3
			Arenig	Fennian								468.4 *
							Billingen					469.3 *
	Early Ordovician	Floian										470
								Latorp †				470.1 *
				Whitlandian								471.1 *
				Whitlandian			Hunneberg					473.7 *
				Moridunian								474.3 *
		Tremadocian	Tremadoc	Migneintian								477.7
				Cressagian					480.8 *
							Varangu		481.3 *
							Pakerort		482.2 *
									485 *
Cambrian	Furongian	Stage 10						Late Cambrian				485.4
												486.3 *
												486.5
		Jiangshanian										489.5
		Paibian										494
	Miaolingian	Guzhangian						Middle Cambrian				Series 3 †	497
		Drumian											500.5
		Wuliuan											Stage 5 †	504.5
	Series 2	Stage 4						Early Cambrian						509
	Series 2	Stage 3												514
	Terreneuvian	Stage 2												521
	Terreneuvian	Fortunian												529
															538.8